No-arg constructor??

[collwill]

I am little confused about no-arg consturctor and need help in understanding exactly what it is. I have googled this topic and is more confused. I have created a class Rectangle. One of my methods is called public double Rectangle(){} which I thought was a no arg constructor.
But when I compile I am getting an saying missing return statement line 9 (verbatim). Am I missing something?

public class Rectangle
{

	private double height = 1.0;
	private double width= 1.0;
	private static String color;

	public double Rectangle()
	{}


	public Rectangle (double high, double wid)
	{
		this.width=wid;
		this.height= high;
	}

	public Rectangle (String recColor)
	{
		color = recColor;
	}

	public void setHeight(double high)
	{
		this.height = high;
	}

	public void setWidth(double wid)
	{
		this.width = wid;
	}

	public void setColor(String col)
	{
		color = col;
	}

	public double getHeight()
	{
		return height;
	}

	public double getWidth()
	{
		return width;
	}

	public double getArea()
	{
		return height*width;
	}

	public double getPerimeter()
	{
		return 2*(height + width);
	}

		public String getRecColor()
	{
		return this.color;
	}

}

[sunde887]

Constructors don't need a return type.

No arg constructors are the same as constructors that take arguments. They are used to be the default way to initialize some object.

[kwgivler]

Are you trying to have a constructor which creates a rectangle, but takes no arguments? You are on the right track, remember a constructor can not return a value...

[collwill]

When I try to compile this code I am receiving an error "missing return statement - line 9 (verbatim). ". Line 9 is: Rectangle(){} . So I am not sure why it is telling me to put a return statement on a no arg constructor. Can someone help understand why I am receiving this error on a no arg constructor?

[sunde887]

Do the other constructors work? A constructor should not have a return type. Just a random attempt at a solution is adding the line this(); in the code block.

[kwgivler]

When I try to compile this code I am receiving an error "missing return statement - line 9 (verbatim). ". Line 9 is: Rectangle(){} . So I am not sure why it is telling me to put a return statement on a no arg constructor. Can someone help understand why I am receiving this error on a no arg constructor?

This compiles for me:

public class Rectangle
{

	private double height = 1.0;
	private double width= 1.0;
	private static String color;

	public Rectangle()
	{}


	public Rectangle (double high, double wid)
	{
		this.width=wid;
		this.height= high;
	}

	public Rectangle (String recColor)
	{
		color = recColor;
	}

	public void setHeight(double high)
	{
		this.height = high;
	}

	public void setWidth(double wid)
	{
		this.width = wid;
	}

	public void setColor(String col)
	{
		color = col;
	}

	public double getHeight()
	{
		return height;
	}

	public double getWidth()
	{
		return width;
	}

	public double getArea()
	{
		return height*width;
	}

	public double getPerimeter()
	{
		return 2*(height + width);
	}

		public String getRecColor()
	{
		return this.color;
	}

}

[collwill]

Ok, looking at it change the no arg constructor and it works better and no compile errors:

public class Rectangle
{

	//Declare variables
	private double height;
	private double width;
	private static String color;

	//no arg constructor
	public Rectangle()
	{
		height = 1.0;
		width= 1.0;
		color="Red";
	}